I'm not sure if you new this but your Lamech Prophecy seems to have something else to it. Maybe a stretch, but I felt I'd pass this along. While Trump was president he brought in two things concerning Israel.
1.) He set the US to recognized Jerusalem as Israel's capital which set other countries to follow - https://en.wikipedia.org/wiki/United_States_recognition_of_Jerusalem_as_capital_of_Israel
2.) He started the Abraham Accords
The reason I bring this up because regarding Israel I believe the Lord was using him and if you calculate from his birth till he became president, guess what you get (https://www.timeanddate.com/date/durationresult.html?m1=6&d1=14&y1=1946&m2=01&d2=20&y2=2017&ti=on).
A match to 777 and a similar point to what you mentioned in your Lamech Prophecy.
But not just that, this also happen on the Jewish/Hebrew year of 5777 (Georgian 2017). So at Genesis Chapter 5 (not sure if the chapters are Holy Spirit inspired) and 5 years after Lamech death the flood came. Hard to believe this all is a coincidence.
To me It seems to be a pattern pointing to Lamech like Abraham and Israel becoming a nation in 1948. Abraham was born 1948 AM (Anno Mundi) on Jewish/Hebrew year calendar, and in Genesis chapter 12 God called Abraham to leave his home at age 75. Well 1948 + 75 = 2023 (7 years till 2030). Also it just happens that famine and war comes after God calls Abraham to leave.
Anyway maybe something too this maybe not just passing it along.